Avast is a cybersecurity company known for its antivirus software and internet security solutions. Founded in 1988 in the Czech Republic, it has grown to become one of the largest security companies in the world, protecting millions of users from malware, viruses, and other online threats. The company's products include free and premium versions of antivirus software, as well as tools for privacy protection and performance optimization. Avast also offers a VPN service to help users maintain their online privacy and security while browsing the internet.